首页> 外国专利> PROCESS FOR THE PRODUCTION OF HIGH TENSILE STRENGTH AND LOW CREEP POLYMER YARNS, HIGH TENSILE STRENGTH AND LOW CREEP POLYMER OR COPOLYMER YARNS, AND, THE USE OF SUCH YARNS

PROCESS FOR THE PRODUCTION OF HIGH TENSILE STRENGTH AND LOW CREEP POLYMER YARNS, HIGH TENSILE STRENGTH AND LOW CREEP POLYMER OR COPOLYMER YARNS, AND, THE USE OF SUCH YARNS

机译：生产高拉伸强度和低蠕变聚合物纱线，高拉伸强度和低蠕变聚合物或共聚物纱线以及使用这种纱线的方法

页面导航

摘要
著录项
相似文献

摘要

The present invention relates to a process for the production of high tensile strength and low creep polymer yarns, wherein it comprises the following steps: (a) preparing a mixture of: (i) a first ultra high molecular weight polyolefin polymer or copolymer, (ii) a second clay nanocomposite polyolefin polymer or copolymer, and (iii) a non-polar spinning solvent, (b) feeding the resulting suspension through an extruder at a temperature of at least 180°C, causing the formation of a gel, (c) spinning the gel so obtained in a spinneret with a length to diameter ratio (L/D) of at least 15, (d) cooling the yarn to a temperature below 2°C, (e) subsequently removing the non-polar spinning solvent, and (f) drawing the yarn so obtained so as to obtain a tensile strength value of at least 18 cN/Dtex and a creep value lower than 0.07% per hour, wherein the first ultra high molecular weight polyolefin polymer or copolymer has a weight-average molecular weight higher than 2,000,000 g/mol and a polydispersivity of at least 7, and the second clay nanocomposite polyolefin polymer or copolymer is obtained via in situ polymerization of an olefin and an exfoliated layered clay, the polyolefin so obtained having a weight-average molecular weight of at least 400,000 g/mol.

机译：本发明涉及生产高拉伸强度和低蠕变聚合物纱线的方法，其中包括以下步骤：（a）制备以下混合物：（i）第一超高分子量聚烯烃聚合物或共聚物， ii）第二种粘土纳米复合聚烯烃聚合物或共聚物，和（iii）非极性纺丝溶剂，（b）将所得悬浮液在至少180°C的温度下通过挤出机送入，导致形成凝胶， c）在喷丝头中以至少15的长径比（L / D）旋转获得的凝胶，（d）将纱线冷却至2°C以下的温度，（e）随后去除非极性纺丝（f）将如此获得的纱线拉伸，以获得至少18 cN / Dtex的拉伸强度值和每小时低于0.07％的蠕变值，其中第一超高分子量聚烯烃聚合物或共聚物具有重均分子量高于2,000,000 g / mol且聚合物所述第二粘土纳米复合聚烯烃聚合物或共聚物是通过烯烃和剥离的层状粘土的原位聚合而获得的，其重均分子量至少为400，000g / mol。

著录项

公开/公告号WO2009059387A1

专利类型
公开/公告日2009-05-14

原文格式PDF
申请/专利权人 BRASKEM S. A.;DA SILVA LETÍCIA SOCAL;DO NASCIMENTO ALAN KARDEC;DE LA RUE BRENO;BECKEDORF MARTHA DE LA RUE;BUENO MARCOS ROBERTO PAULINO;
展开▼

申请/专利号WO2008BR00333
发明设计人 BUENO MARCOS ROBERTO PAULINO;DE LA RUE BRENO;DO NASCIMENTO ALAN KARDEC;DA SILVA LETÍCIA SOCAL;BECKEDORF MARTHA DE LA RUE;
展开▼

申请日2008-11-07
分类号C08L23/06;C08K7/04;C08K9/08;D01F1/09;
国家 WO
入库时间 2022-08-21 19:18:54

相似文献

专利
外文文献
中文文献